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【已解决】webpack-dev-server打开主页出错Cannot GET /undefined

Webpack crifan 149浏览 0评论

webpack-dev-server中,之前可以正常自动调用浏览器打开地址:

http://localhost:8080/

正常显示主页内容的。但是不知道何时,现在变成打开了:

http://localhost:8080/undefined

所以出错:

Cannot GET /undefined

之前已经听说了:

webpack-3 react-router-4 react-15.6 升级记录 – mjzhang1993的博客 – CSDN博客

好像甚至对应的参数openPage?

就可以了

对应的,但是此处的open没有设置啊

不应该打开页面才对

此处webpack-dev-server对应的配置是:

devServer: {
port: process.env.PORT || 8080,
host: ‘localhost’,
// publicPath: ‘/’,
publicPath: ‘/uapp/’,
contentBase: ‘./src’,
historyApiFallback: true,
open: true,
proxy: {
// OPTIONAL: proxy configuration:
// ‘/optional-prefix/**’: { // path pattern to rewrite
//   target: ‘http://target-host.com’,
//   pathRewrite: path => path.replace(/^\/[^\/]+\//, ”)   // strip first path segment
// }
}
}

cannot get /undefined webpack

算了,都找不到解决办法。

还是自己去试试吧。

先看看版本

➜  ucowsapp git:(master) ✗ webpack-dev-server -v
webpack-dev-server 2.5.0
webpack 2.6.1

在看看参数:

➜  ucowsapp git:(master) ✗ webpack-dev-server –help
webpack-dev-server 2.5.0
webpack 2.6.1
Usage: https://webpack.js.org/configuration/dev-server/
Config options:
–config  Path to the config file
[字符串] [默认值: webpack.config.js or webpackfile.js]
–env     Environment passed to the config, when it is a function
Basic options:
–context    The root directory for resolving entry point and stats
[字符串] [默认值: The current directory]
–entry      The entry point                                          [字符串]
–watch, -w  Watch the filesystem for changes                           [布尔]
–debug      Switch loaders to debug mode                               [布尔]
–devtool    Enable devtool for better debugging experience (Example:
–devtool eval-cheap-module-source-map)                  [字符串]
-d           shortcut for –debug –devtool eval-cheap-module-source-map
–output-pathinfo                                          [布尔]
-p           shortcut for –optimize-minimize –define
process.env.NODE_ENV=”production”                          [布尔]
–progress   Print compilation progress in percentage                   [布尔]
Module options:
–module-bind       Bind an extension to a loader                     [字符串]
–module-bind-post                                                    [字符串]
–module-bind-pre                                                     [字符串]
Output options:
–output-path                 The output path for compilation assets
[字符串] [默认值: The current directory]
–output-filename             The output filename of the bundle
[字符串] [默认值: [name].js]
–output-chunk-filename       The output filename for additional chunks
[字符串] [默认值: filename with [id] instead of [name] or [id] prefixed]
–output-source-map-filename  The output filename for the SourceMap   [字符串]
–output-public-path          The public path for the assets          [字符串]
–output-jsonp-function       The name of the jsonp function used for chunk
loading                                 [字符串]
–output-pathinfo             Include a comment with the request for every
dependency (require, import, etc.)        [布尔]
–output-library              Expose the exports of the entry point as library
[字符串]
–output-library-target       The type for exposing the exports of the entry
point as library                        [字符串]
Advanced options:
–records-input-path       Path to the records file (reading)         [字符串]
–records-output-path      Path to the records file (writing)         [字符串]
–records-path             Path to the records file                   [字符串]
–define                   Define any free var in the bundle          [字符串]
–target                   The targeted execution environment         [字符串]
–cache                    Enable in memory caching
[布尔] [默认值: It’s enabled by default when watching]
–watch-stdin, –stdin     close when stdin ends                        [布尔]
–watch-aggregate-timeout  Timeout for gathering changes while watching
–watch-poll               The polling interval for watching (also enable
polling)                                     [布尔]
–hot                      Enables Hot Module Replacement               [布尔]
–prefetch                 Prefetch this request (Example: –prefetch
./file.js)                                 [字符串]
–provide                  Provide these modules as free vars in all modules
(Example: –provide jQuery=jquery)         [字符串]
–labeled-modules          Enables labeled modules                      [布尔]
–plugin                   Load this plugin                           [字符串]
–bail                     Abort the compilation on first error         [布尔]
–profile                  Profile the compilation and include information in
stats                                        [布尔]
–hot-only                 Do not refresh page if HMR fails             [布尔]
Resolving options:
–resolve-alias         Setup a module alias for resolving (Example:
jquery-plugin=jquery.plugin)                  [字符串]
–resolve-extensions    Setup extensions that should be used to resolve
modules (Example: –resolve-extensions .es6 .js)[数组]
–resolve-loader-alias  Setup a loader alias for resolving            [字符串]
Optimizing options:
–optimize-max-chunks      Try to keep the chunk count below a limit
–optimize-min-chunk-size  Try to keep the chunk size above a limit
–optimize-minimize        Minimize javascript and switches loaders to
minimizing                                   [布尔]
Stats options:
–color, –colors   Enables/Disables colors on the console
[布尔] [默认值: (supports-color)]
–info              Info                                 [布尔] [默认值: true]
–quiet             Quiet                                               [布尔]
–client-log-level  Log level in the browser (info, warning, error or none)
[字符串] [默认值: “info”]
SSL options:
–https           HTTPS                                                 [布尔]
–key             Path to a SSL key.                                  [字符串]
–cert            Path to a SSL certificate.                          [字符串]
–cacert          Path to a SSL CA certificate.                       [字符串]
–pfx             Path to a SSL pfx file.                             [字符串]
–pfx-passphrase  Passphrase for pfx file.                            [字符串]
Response options:
–content-base          A directory or URL to serve HTML content from.[字符串]
–watch-content-base    Enable live-reloading of the content-base.      [布尔]
–history-api-fallback  Fallback to /index.html for Single Page Applications.
[布尔]
–compress              Enable gzip compression                         [布尔]
Connection options:
–port    The port
–socket  Socket to listen
–public  The public hostname/ip address of the server                [字符串]
–host    The hostname/ip address the server will bind to
[字符串] [默认值: “localhost”]
选项:
–help, -h     显示帮助信息                                             [布尔]
–version, -v  显示版本号                                               [布尔]
–bonjour      Broadcasts the server via ZeroConf networking on start   [布尔]
–lazy         Lazy                                                     [布尔]
–inline       Inline mode (set to false to disable including client scripts
like livereload)                          [布尔] [默认值: true]
–open         Open default browser                                     [布尔]
–useLocalIp   Open default browser with local IP                       [布尔]
–open-page    Open default browser with the specified page           [字符串]

其中的:

–open         Open default browser                                     [布尔]

–open-page    Open default browser with the specified page           [字符串]

就是和此处的:

webpack-dev-server在编辑后,自动打开页面,以及页面地址,有关系

所以去加上:

openPage: “http://localhost:8080/uapp/”,

结果打开了:

所以去改为:

openPage: “/uapp/”,

结果会去打开:

http://localhost:8080//uapp/

所以改为:

openPage: “uapp/”,

结果就可以了,打开了希望的:

http://localhost:8080/uapp/

【总结】

webpack-dev-server的配置此处是用到了webpack.config.babel.js中的devServer,

之前配置了:

open: true,

使得webpack-dev-server编译后,会自动调用浏览器browser去打开主页

而此处由于之前设置了publicPath,所以主页的地址从:

http://localhost:8080/

变成了:

http://localhost:8080/uapp/

所以,此处之前默认开的:

http://localhost:8080/

就找不到页面了,所以通过增加配置:

openPage: “uapp/”,

完整配置为:

devServer: {
port: process.env.PORT || 8080,
host: ‘localhost’,
publicPath: ‘/uapp/’,
。。。
open: true,
openPage: “uapp/”,
。。。
}
}

使得能直接打开:

http://localhost:8080/uapp/

从而正常显示主页内容了。

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